Android asynchronous design API

Question

I am writing an Android library that is essentially asynchronous (waiting for events from a USB device connected to a micro USB port). Considering how Android packages implement asynchronous APIs, I found several different ways:

• Receiving PendingIntentand sending it when an event occurs (for example: UsbManager.requestPermission () , NfcAdapter.enableForegroundDispatch () ).
• Defining a callback internal interface and retrieving its instance, and then calling it when an event occurs (examples include View and its subclasses).
• Accepting the "translation of the action" as a string, and then passing this action (possibly locally using the LocalBroadcastManager) ( Example from the IntentService documentation ).
• Having a purely synchronous API and allowing the caller to call it asynchronously (for example, in AsyncTask) (for example: SQLiteOpenHelper.getReadableDatabase () ).

How do I create my own API? Are there any recommendations for using each kind of API?

Answer 1

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